KR101796332B1 - 엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트 - Google Patents

엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트 Download PDF

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Publication number
KR101796332B1
KR101796332B1 KR1020127024657A KR20127024657A KR101796332B1 KR 101796332 B1 KR101796332 B1 KR 101796332B1 KR 1020127024657 A KR1020127024657 A KR 1020127024657A KR 20127024657 A KR20127024657 A KR 20127024657A KR 101796332 B1 KR101796332 B1 KR 101796332B1
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KR
South Korea
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film
white
backlight
guide plate
manufactured
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Expired - Fee Related
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KR1020127024657A
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English (en)
Korean (ko)
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KR20120121411A (ko
Inventor
요시히코 사카구치
유지 가와타
오사무 와타나베
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도레이 카부시키가이샤
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Application filed by 도레이 카부시키가이샤 filed Critical 도레이 카부시키가이샤
Publication of KR20120121411A publication Critical patent/KR20120121411A/ko
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0808—Mirrors having a single reflecting layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Laminated Bodies (AREA)
KR1020127024657A 2010-02-24 2011-02-18 엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트 Expired - Fee Related KR101796332B1 (ko)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JPJP-P-2010-038261 2010-02-24
JP2010038261 2010-02-24
JP2010226193 2010-10-06
JPJP-P-2010-226193 2010-10-06
PCT/JP2011/053485 WO2011105294A1 (ja) 2010-02-24 2011-02-18 エッジライト型バックライト用白色反射フィルム及びそれを用いたバックライト

Related Child Applications (2)

Application Number Title Priority Date Filing Date
KR1020177026442A Division KR20170109697A (ko) 2010-02-24 2011-02-18 엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트
KR1020177026441A Division KR20170109696A (ko) 2010-02-24 2011-02-18 엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트

Publications (2)

Publication Number Publication Date
KR20120121411A KR20120121411A (ko) 2012-11-05
KR101796332B1 true KR101796332B1 (ko) 2017-11-09

Family

ID=44506706

Family Applications (3)

Application Number Title Priority Date Filing Date
KR1020127024657A Expired - Fee Related KR101796332B1 (ko) 2010-02-24 2011-02-18 엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트
KR1020177026442A Ceased KR20170109697A (ko) 2010-02-24 2011-02-18 엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트
KR1020177026441A Ceased KR20170109696A (ko) 2010-02-24 2011-02-18 엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트

Family Applications After (2)

Application Number Title Priority Date Filing Date
KR1020177026442A Ceased KR20170109697A (ko) 2010-02-24 2011-02-18 엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트
KR1020177026441A Ceased KR20170109696A (ko) 2010-02-24 2011-02-18 엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트

Country Status (8)

Country Link
US (1) US9817160B2 (enExample)
EP (1) EP2541285B1 (enExample)
JP (4) JP5578177B2 (enExample)
KR (3) KR101796332B1 (enExample)
CN (1) CN102713692B (enExample)
MX (1) MX2012009190A (enExample)
TW (1) TWI499793B (enExample)
WO (1) WO2011105294A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11119267B2 (en) 2018-07-13 2021-09-14 Samsung Electronics Co., Ltd. Reflective sheet and display apparatus having the same

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101796332B1 (ko) * 2010-02-24 2017-11-09 도레이 카부시키가이샤 엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트
JP5744484B2 (ja) * 2010-11-15 2015-07-08 帝人デュポンフィルム株式会社 反射フィルム
JP5739178B2 (ja) * 2011-01-31 2015-06-24 帝人デュポンフィルム株式会社 反射フィルム
JP5771064B2 (ja) * 2011-05-17 2015-08-26 帝人デュポンフィルム株式会社 反射フィルム
JP5973145B2 (ja) * 2011-09-15 2016-08-23 株式会社ユポ・コーポレーション 光反射体、及びそれを用いた面光源装置
JP6051589B2 (ja) * 2012-05-11 2016-12-27 東レ株式会社 積層ポリエステルフィルム
KR102001118B1 (ko) * 2012-12-28 2019-07-17 도레이첨단소재 주식회사 액정 디스플레이 반사판용 적층형 백색 폴리에스테르 필름
KR102001119B1 (ko) * 2012-12-28 2019-07-17 도레이첨단소재 주식회사 액정 디스플레이 반사판용 적층형 백색 폴리에스테르 필름
CN103062708A (zh) * 2013-01-11 2013-04-24 北京京东方光电科技有限公司 反射膜及应用其的背光源
KR102272688B1 (ko) * 2013-06-07 2021-07-05 도레이 카부시키가이샤 광 반사 필름 및 에지 라이트형 백라이트
JP5898345B2 (ja) * 2013-08-07 2016-04-06 帝人デュポンフィルム株式会社 白色反射フィルム
JP6352613B2 (ja) * 2013-10-24 2018-07-04 帝人フィルムソリューション株式会社 白色反射フィルム
JP6336266B2 (ja) * 2013-11-29 2018-06-06 帝人フィルムソリューション株式会社 白色反射フィルム
WO2015146732A1 (ja) 2014-03-27 2015-10-01 東レ株式会社 積層フィルム
CN106233167B (zh) 2014-04-25 2018-11-13 东丽株式会社 边光式背光源用反射膜及使用其的背光源
WO2015183822A1 (en) * 2014-05-30 2015-12-03 Kimberly-Clark Worldwide, Inc. Lighting devices
WO2015182448A1 (ja) * 2014-05-30 2015-12-03 東レ株式会社 反射フィルムおよびそれを用いたエッジライト型バックライトユニット
KR20170039618A (ko) 2014-07-31 2017-04-11 도레이 카부시키가이샤 폴리에스테르 필름
JP6641627B2 (ja) * 2014-09-17 2020-02-05 東レ株式会社 反射フィルムおよびそれを用いたエッジライト型バックライトユニット
JP6518057B2 (ja) * 2014-11-13 2019-05-22 株式会社きもと 光拡散性部材及びそれを用いたバックライトユニット
JP2018063749A (ja) * 2015-03-04 2018-04-19 株式会社きもと 有機ｅｌ用散乱フィルムおよびそれを用いた有機ｅｌ発光装置
JP2017044718A (ja) * 2015-08-24 2017-03-02 東レ株式会社 反射フィルムおよびそれを用いたエッジライト型バックライト
US10224445B2 (en) * 2015-11-02 2019-03-05 S-Energy Co., Ltd. Back sheet, method of manufacturing the same, solar cell module using the same and method of manufacturing solar cell
KR102700941B1 (ko) 2016-10-21 2024-09-02 삼성디스플레이 주식회사 재귀반사층을 갖는 컬러 기판 및 이를 포함하는 표시 장치
JP2020011430A (ja) * 2018-07-17 2020-01-23 三菱ケミカル株式会社 反射材
WO2020196760A1 (ja) 2019-03-28 2020-10-01 三菱ケミカル株式会社 反射材
WO2023054591A1 (ja) 2021-09-30 2023-04-06 古河電気工業株式会社 紫外線、可視光線および／または赤外線を拡散反射する物品およびその製造方法
CN114016018B (zh) * 2021-11-05 2023-07-04 江苏徐工工程机械研究院有限公司 具有复合涂层的工件及其制造方法
CN114428416B (zh) * 2021-12-31 2023-09-19 宁波长阳科技股份有限公司 一种手机背光模块用高抗压高亮度涂布型聚酯反射膜

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008512719A (ja) * 2004-09-13 2008-04-24 エスケーシー ハース ディスプレイ フィルムズ カンパニー，リミテッド 反射シートおよびこれを採用したバックライトユニット
JP2009179037A (ja) * 2008-02-01 2009-08-13 Toray Ind Inc 積層フィルム

Family Cites Families (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2407680A (en) * 1945-03-02 1946-09-17 Minnesota Mining & Mfg Reflex light reflector
US2948191A (en) * 1956-06-06 1960-08-09 Cataphote Corp Retroreflecting surface
JP3683965B2 (ja) 1995-01-27 2005-08-17 三井化学株式会社 光反射体及びそれを用いた光反射装置
US6579606B1 (en) * 1995-08-30 2003-06-17 3M Innovative Properties Company Back light reflection sheet for liquid crystal
JP2000066013A (ja) * 1998-08-25 2000-03-03 Dainippon Printing Co Ltd 光反射光学シート及び面光源装置
JP2000214792A (ja) * 1999-01-26 2000-08-04 Ohtsu Tire & Rubber Co Ltd :The バックライトユニット、バックライト及びそれに用いるスペ―スシ―ト
JP2000258612A (ja) * 1999-03-05 2000-09-22 Daicel Chem Ind Ltd 光散乱シート
JP3531668B2 (ja) * 1999-10-01 2004-05-31 積水化成品工業株式会社 光拡散シート
JP2001166295A (ja) 1999-12-03 2001-06-22 Cosmo Tec:Kk 液晶表示装置バックライト用ランプリフレクター
JP3870731B2 (ja) 2000-07-12 2007-01-24 東レ株式会社 面光源反射部材用白色フィルム
JP2002138150A (ja) 2000-11-02 2002-05-14 Teijin Ltd 白色ポリエステルフィルム
KR100562971B1 (ko) * 2000-12-14 2006-03-23 미쯔이카가쿠 가부시기가이샤 반사체, 사이드라이트형 백라이트장치 및 반사체용 기판
JP4945032B2 (ja) * 2001-05-08 2012-06-06 恵和株式会社 反射シート及びこれを用いたバックライトユニット
US6906761B2 (en) 2001-09-19 2005-06-14 Keiwa Inc. Reflection sheet and backlight unit using the same
JP4681791B2 (ja) 2002-08-22 2011-05-11 恵和株式会社 反射シート及びこれを用いたバックライトユニット
JP4712252B2 (ja) 2001-09-19 2011-06-29 恵和株式会社 反射シート及びこれを用いたバックライトユニット
CN100362407C (zh) * 2001-09-27 2008-01-16 株式会社智积电 反射膜
TW583084B (en) * 2001-10-15 2004-04-11 Tsujiden Co Ltd Light diffusion film
JP4090283B2 (ja) * 2002-06-07 2008-05-28 三井化学株式会社 反射体及びそれを用いたサイドライト型バックライト装置
KR100926299B1 (ko) * 2002-11-13 2009-11-12 삼성전자주식회사 백라이트 어셈블리용 반사판 및 이를 사용하는 백라이트어셈블리
KR100719482B1 (ko) * 2004-09-13 2007-05-18 에스케이씨 주식회사 반사시트 및 이를 채용한 백라이트 유닛
GB0602105D0 (en) * 2006-02-02 2006-03-15 3M Innovative Properties Co License plate assembly
TWI274901B (en) * 2006-03-13 2007-03-01 Exploit Technology Co Ltd Oriented diffusion reflection sheet
JP2007293289A (ja) * 2006-03-30 2007-11-08 Chisso Corp 光反射シート
JP2007298678A (ja) * 2006-04-28 2007-11-15 Toyobo Co Ltd 反射部材用支持体フィルム
US9046638B2 (en) * 2006-06-23 2015-06-02 Toray Industries, Inc. White reflection film
US7905650B2 (en) * 2006-08-25 2011-03-15 3M Innovative Properties Company Backlight suitable for display devices
WO2008139861A1 (ja) * 2007-05-08 2008-11-20 Toray Industries, Inc. 白色反射フィルム
EP2162785B1 (en) * 2007-05-20 2018-03-07 3M Innovative Properties Company Design parameters for thin hollow cavity backlights of the light-recycling type
JP2009093863A (ja) * 2007-10-05 2009-04-30 Fujifilm Corp 面状照明装置
JP2011032169A (ja) * 2007-12-11 2011-02-17 Genecare Research Institute Co Ltd ４−アミノピリミジン誘導体および該化合物を含有する医薬組成物
KR101511997B1 (ko) 2007-12-11 2015-04-14 도레이 카부시키가이샤 적층 필름
JP2009244509A (ja) * 2008-03-31 2009-10-22 Mitsubishi Rayon Co Ltd 反射シート
JP5138493B2 (ja) 2008-07-31 2013-02-06 セイコーインスツル株式会社 表示装置
KR101796332B1 (ko) * 2010-02-24 2017-11-09 도레이 카부시키가이샤 엣지 라이트형 백라이트용 백색 반사 필름 및 그것을 이용한 백라이트

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008512719A (ja) * 2004-09-13 2008-04-24 エスケーシー ハース ディスプレイ フィルムズ カンパニー，リミテッド 反射シートおよびこれを採用したバックライトユニット
JP2009179037A (ja) * 2008-02-01 2009-08-13 Toray Ind Inc 積層フィルム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11119267B2 (en) 2018-07-13 2021-09-14 Samsung Electronics Co., Ltd. Reflective sheet and display apparatus having the same

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Publication number Publication date
KR20170109697A (ko) 2017-09-29
JP6017475B2 (ja) 2016-11-02
JP6355204B2 (ja) 2018-07-11
CN102713692B (zh) 2014-12-10
EP2541285A1 (en) 2013-01-02
JP6485758B2 (ja) 2019-03-20
MX2012009190A (es) 2012-08-31
JP2018018085A (ja) 2018-02-01
TW201131195A (en) 2011-09-16
WO2011105294A1 (ja) 2011-09-01
JP5578177B2 (ja) 2014-08-27
KR20170109696A (ko) 2017-09-29
TWI499793B (zh) 2015-09-11
US9817160B2 (en) 2017-11-14
JP2014112251A (ja) 2014-06-19
EP2541285B1 (en) 2021-10-20
KR20120121411A (ko) 2012-11-05
JPWO2011105294A1 (ja) 2013-06-20
EP2541285A4 (en) 2014-04-30
JP2015163986A (ja) 2015-09-10
US20120314450A1 (en) 2012-12-13
CN102713692A (zh) 2012-10-03

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